Engine CFM Calculator

Fill in the fields below (example: 5000 RPM), click calculate, and we'll show you the optimal cfm for the street and track!


Maximum Engine RPM:

Engine Size in Cubic Inches:

Volumetric Efficiency(in percentage):


Carb CFM :

Engine CFM Calculator

The Engine CFM (Cubic Feet per Minute) Calculator is a tool used to estimate the airflow capacity of an engine’s intake system. It calculates the volume of air that the engine can ingest in one minute based on the inputs provided.


The formula for the Engine CFM (Cubic Feet per Minute) Calculator, as per the provided code, is:

CFM = (Max Engine RPM * Engine Size) / 3456 * (Volumetric Efficiency / 100)


Example: Let’s assume a maximum engine RPM of 6000, an engine size of 350 cubic inches, and a volumetric efficiency of 90%. By inputting these values into the calculator, the calculated CFM will be:

CFM = (6000 * 350) / 3456 * (90 / 100) = 577.5

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